1 /* ===-- assembly.h - libUnwind assembler support macros -------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 * ===----------------------------------------------------------------------=== 9 * 10 * This file defines macros for use in libUnwind assembler source. 11 * This file is not part of the interface of this library. 12 * 13 * ===----------------------------------------------------------------------=== 14 */ 15 16 #ifndef UNWIND_ASSEMBLY_H 17 #define UNWIND_ASSEMBLY_H 18 19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__) 20 #define SEPARATOR @ 21 #elif defined(__arm64__) 22 #define SEPARATOR %% 23 #else 24 #define SEPARATOR ; 25 #endif 26 27 #if defined(__APPLE__) 28 #define HIDDEN_DIRECTIVE .private_extern 29 #else 30 #define HIDDEN_DIRECTIVE .hidden 31 #endif 32 33 #define GLUE2(a, b) a ## b 34 #define GLUE(a, b) GLUE2(a, b) 35 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) 36 37 #if defined(__APPLE__) 38 #define SYMBOL_IS_FUNC(name) 39 #elif defined(__ELF__) 40 #if defined(__arm__) 41 #define SYMBOL_IS_FUNC(name) .type name,%function 42 #else 43 #define SYMBOL_IS_FUNC(name) .type name,@function 44 #endif 45 #else 46 #define SYMBOL_IS_FUNC(name) \ 47 .def name SEPARATOR \ 48 .scl 2 SEPARATOR \ 49 .type 32 SEPARATOR \ 50 .endef 51 #endif 52 53 #define DEFINE_LIBUNWIND_FUNCTION(name) \ 54 .globl SYMBOL_NAME(name) SEPARATOR \ 55 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 56 SYMBOL_NAME(name): 57 58 #define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name) \ 59 .globl SYMBOL_NAME(name) SEPARATOR \ 60 HIDDEN_DIRECTIVE SYMBOL_NAME(name) SEPARATOR \ 61 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 62 SYMBOL_NAME(name): 63 64 #if defined(__arm__) 65 #if !defined(__ARM_ARCH) 66 #define __ARM_ARCH 4 67 #endif 68 69 #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 70 #define ARM_HAS_BX 71 #endif 72 73 #ifdef ARM_HAS_BX 74 #define JMP(r) bx r 75 #else 76 #define JMP(r) mov pc, r 77 #endif 78 #endif /* __arm__ */ 79 80 #endif /* UNWIND_ASSEMBLY_H */ 81
